[Решено] language switcher not working in translated pages

Background of the issue:
I am trying to use the WPML language switcher on my site скрытая ссылка. The switcher works fine on the homepage, but I am experiencing issues on other pages.

Symptoms:
The language switcher is not working properly on pages other than the homepage, such as 'reviews' and 'crypto'. The design is not good, or the switcher is not showing.

Questions:
Why is the language switcher not displaying correctly on pages other than the homepage?
How can I fix the design issues with the language switcher on specific pages?